28 CFR 73.2: Exceptions.

(a) The exemption provided in 18 U.S.C. 951(d)(4) for a “legal commercial transaction” shall not be available to any person acting subject to the direction or control of a foreign government or official where such person is an agent of Cuba or any other country that the President determines (and so reports to the Congress) poses a threat to the national security interest of the United States for purposes of 18 U.S.C. 951; or has been convicted of or entered a plea of nolo contendere to any offense under 18 U.S.C. 792-799, 831, or 2381, or under section 11 of the Export Administration Act of 1979, 50 U.S.C. app. 2410.

(b) The provisions of 18 U.S.C. 951(e)(2)(A) do not apply if the Attorney General, after consultation with the Secretary of State, determines and reports to Congress that the national security or foreign policy interests of the United States require that these provisions do not apply in specific circumstances to agents of such country.

(c) The provisions of 18 U.S.C. 951(e)(2)(B) do not apply to a person described in this clause for a period of more than five years beginning on the date of the conviction or the date of entry of the plea of nolo contendere.